Barry Stanley John O’Keefe AM QC, (20 May 1933 – 24 April 2014) was an Australian judge and lawyer who served as a justice of the Supreme Court of New South Wales from 1993 to 2004 and the Commissioner of the Independent Commission Against Corruption (ICAC) from 1994 until 1999.
An influential member of Australia's Roman Catholic community, O'Keefe was appointed to the Truth, Justice and Healing Council in 2012, where he organized the Australian Catholic Bishops Conference's response to the findings of the Royal Commission into Institutional Responses to Child Sexual Abuse.
Their parents sent both brothers to Waverley College, a private Roman Catholic school.
O'Keefe was admitted to the New South Wales Bar Association in 1958 and appointed to Queen's Counsel in 1974.
Two days before O’Keefe's death, Pope Francis created him a Knight Grand Cross (First Class) of the Order of St Gregory the Great.